#include<stdio.h>
#include<ctype.h>
char c;
int ok,nr,nc;
int main()
{freopen("text.in","r",stdin);
 freopen("text.out","w",stdout);
 while(!feof(stdin))
 {scanf("%c",&c);
  if(isalpha(c)) {nr++;ok=1;}
  else {nc=nc+ok;ok=0;} }
 if(ok) nc++;
 printf("%d",nr/nc);
 fclose(stdout);
 return 0;}